I got tired of growing pumpkins and squash that were always killed by the dreaded SVB. I found an article in Mother Earth News that explained all about the moth that lays the egg that grows into the SVB..anyway if you grow Cucurbita moshata..a type of squash that has dense solid stems they are totally immune to SVB damage. I grew a Rumbo pumpkin that was wonderful. It is actually a cross between a winter squash and pumpkin. If you read the seed catalogs that give the real botanical names you can find other types as well. The Rumbo's were delicious and beautiful too. The only thing is that you can't carve them like a jack o lantern because they are dense. I got my original seeds from Jungs but Parks used to carry them too. There are also several varieties in the Baker Creek catalog as well. I attached a link to the Rumbo so you can see it. Here is a link that might be useful: Rumbo pumpkin

" Someday I am convinced that one of us on this forum will come up with an SVB deterrent that is absolutely revolutionary and startlingly simple." We need a parthenocarpic zucchini, that will produce without insect pollination, like greenhouse cukes. You could cover it with row cover to keep out SVB, only removing the cover to harvest. Any breeders out there listening??? I second the recommendation for "Tromboncino". SVB & mosaic were persistent problems when I grew zucchini; and while they still attack Tromboncino, they seldom kill it. I've seen the frass of SVB at the base of the vines, but the plant seems to have some defense; the infestation seldom progresses, and there is no sign of the larvae later in the season. The fact that the squash are 90% seedless doesn't hurt either... it has permanently replaced zucchini in my garden. But if you enjoy bush zucchini, then you need to deal with SVB. Some say to slice the stem & remove the larvae... but there were usually at least 4-5 in each stem, and I had shredded the stem by the time I removed them all. The plants never recovered. I had better luck with a long, curved tweezers, thrust into their holes... if I couldn't pull them out, I scrambled them. ;-) You could probably do the same thing with a pipe cleaner pushed in & out of each hole a few times. I've been dying to try a water pick, to see if it will blow them out of their holes. Not growing anything susceptible this year, though. The BT & syringe method works, but it is best done as a preventive measure, or when the infestation is not yet advanced.

Gina, It is great to hear that the rest of the garden is doing so well and that the drip irrigation on a timer is keeping your garden plants happy. I hope your vacation was both fun and relaxing. Now, let's address the SVBs, First, you have to laugh with me when I say this, alright? I'm not saying it to be mean, but rather to be completely honest: The war is not on. The war is over and your plants lost. If you have any surviving squash plants, unless they are C. moschata types, their chances of surviving SVBs that already have killed most your plants are somewhere between slim and none. With squash vine borers in our climate, the only hope any of us has lies in prevention. Once they hit your plants, there's a very low success rate in combating them. I'm going to link information that includes a list of chemicals used on them in case you want to try chemicals. I don't use these chemicals for SVBs myself, so cannot tell you from first-hand experience whether they are effective or not. Rather than using chemicals, I rely on Integrated Pest Management. With IPM techniques, I can mostly control them, at least long enough to harvest plenty of summer squash. I also plant seeds of new squash plants, as far away from the existing plants as possible, about every 3 or 4 weeks. That gives me backup plants away from the main planting. Sometimes the SVBs find the main planting and miss the backup planting on the other side of the garden, but sometimes they find the backup plants while they're still young and take them out too. Sometimes I have no SVBs at all, like last year, but that's likely a function of the weather conditions more so than anything I've done. The best way to prevent them is to keep your plants covered with a floating row cover like Reemay or Agribon, and to lift the cover only long enough to hand-pollinate the squash yourself. Or, keep them covered until they bloom, and then remove the floating row cover permanently and just take your chances after that. Most years I get a really good squash harvest early, and I plant a ton of plants so I can freeze a lot of it. Then, SVBs arrive in July and take out the plants most years, and then, after I've removed the plants and put them in black garbage bags (in case there's lingering SVB larvae in them), I replant for a fall harvest. I do that even if the succession plants escape SVB damage in July, because we often have a second generation that's likely to hit the succession plants. Your clean-up of the SVBs does not end when you remove the plants. In the winter, you need to rototill, plow or dig up the entire area where you grew squash and search carefully for cocoons overwintering in the soil. Remove and destroy any you find. Repeat the process several times over the course of the winter. Then, next spring plant the squash in a different part of the garden and put something that is not related to squash in the area where you have had the squash this year. The worst thing you can do is put the squash next year in the exact same place as you had the squash this year. Had you been home when they hit, you might have been able to take a sharp paring knife, pocket knife or razor blade and slice into the stem, find the SVB larvae, remove them, kill them, and put the stem back together, packing several inches of soil firmly on top of it to sort of serve as a bandage to cover the open wound. Then if you had kept the plant well-watered, it would have had a chance to survive. However, in our climate, this sort of plant surgery often only gives you a few days or a couple of weeks longer with the plant because, as your neighbor noted, more of those clear-wing moths just keep coming. Some people use either Bt 'kurstaki', beneficial nematodes, or spinosad, injected into the squash stems weekly with a syringe, to try to kill the SVB larvae once they make it ino the stems. Some have success with that, some don't. It is easier to use this technique successfully in a more northern climate than ours, where there is only one generation of SVBs. Here, where we have a least two generations, it may not be as successful. Another way to get a squash harvest despite the SVBs is to plant C. moschata types. For winter squash, I usually rely upon butternut, Seminole and Tahitian Melon. I've lost both butternut and Tahitian melon to SVBs in some years, but never Seminole. A lot of people plant zuchetta for summer squash because it also is very SVB tolerant. Planting a strip of buckwheat alongside your squash may help reduce the SVB population by attracting beneficial insects that attack the SVB larvae. If you plant the buckwheat seeds the same time you either plant your squash seeds in the ground or transplant squash plants into the ground, because buckwheat is a fast grower, it will be up, growing and flowering before the SVBs arrive. As far as SVBs attacking melons or cukes, I've never had them attacked by SVBs so I don' consider it much of an issue. Other people may have had theirs attacked by SVBs and may have advice in that area. Hope this helps, Dawn Here is a link that might be useful: SVB Control

Well to definitively answer myself, from my original questions: How concerned should I be? Somewhat. They definitely attacked my vines, but they have not taken down the whole plant yet. The base of the plant seems pretty intact. About half the plant has been killed ( I have 3 plants, so about half of each). I have gotten cucumbers so I am not as worried, but yields have been less than expected. Will the grubs be able to burrow in and kill the vines? Yes:Numerous portions of the vines have been wilting and I have seen signs of damage. So yeah they are not immune to SVB. They are not taken down as easily as squash though. I need to spend some time cleaning out the dead vines and trying to prevent some of these grubs from completing their life cycles.